Table 3 Description of training games in the CT condition with their duration and the cognitive loading

Repeat a drum rhythm that increases in length

3 mistakes

Working memory, attention

Flanker task

80 s

Cognitive flexibility

Put a sequence in the correct prompted order

180 s

Visuospatial function, focused attention

An ‘N-back’ task using bottles of various shapes and colors

180 s

Working memory

Evaluate if a ‘totem pole’ comprising blocks of different forms and diameters matches a top view

2 mistakes

Visuospatial function, mental rotation

Follow one or more moving targets (i.e. a bunny with a carrot) between several distractors

4 mistakes

Focused and divided attention

Accept or decline stimuli based on switching rules with increasing speed

90 s

Cognitive flexibility, processing speed

Remember an increasing number of colored squares

120 s

Working memory, attention

Click an increasing number of stimuli (i.e. food on a barbeque) at the right time (i.e. when they are well-done)

180 s

Divided attention, psychomotor and processing speed

Search birds with a certain color and form between an increasing number of distractors

300 s

Visuospatial function, processing speed

Stack blocks of numbers that differ by one on top of another to reduce the number of blocks

180 s

Planning

Remember the color and accessories of a penguin and at the same time the location of a fish

180 s

Working memory, processing speed

Finish a puzzle within a limited time

240 s

Visuospatial function, processing speed